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-rw-r--r--crates/ra_hir/src/nameres/lower.rs222
1 files changed, 0 insertions, 222 deletions
diff --git a/crates/ra_hir/src/nameres/lower.rs b/crates/ra_hir/src/nameres/lower.rs
deleted file mode 100644
index 56262ad6d..000000000
--- a/crates/ra_hir/src/nameres/lower.rs
+++ /dev/null
@@ -1,222 +0,0 @@
1use std::sync::Arc;
2
3use ra_syntax::{
4 AstNode, SourceFile, TreeArc, AstPtr,
5 ast::{self, ModuleItemOwner, NameOwner, AttrsOwner},
6};
7use ra_arena::{Arena, RawId, impl_arena_id, map::ArenaMap};
8use rustc_hash::FxHashMap;
9
10use crate::{
11 SourceItemId, Path, ModuleSource, Name,
12 HirFileId, MacroCallLoc, AsName, PerNs, Function,
13 ModuleDef, Module, Struct, Enum, Const, Static, Trait, TypeAlias,
14 ids::LocationCtx, PersistentHirDatabase,
15};
16
17#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
18pub struct ImportId(RawId);
19impl_arena_id!(ImportId);
20
21#[derive(Debug, PartialEq, Eq)]
22pub(super) struct ImportData {
23 pub(super) path: Path,
24 pub(super) alias: Option<Name>,
25 pub(super) is_glob: bool,
26 pub(super) is_prelude: bool,
27 pub(super) is_extern_crate: bool,
28}
29
30/// A set of items and imports declared inside a module, without relation to
31/// other modules.
32///
33/// This sits in-between raw syntax and name resolution and allows us to avoid
34/// recomputing name res: if two instance of `InputModuleItems` are the same, we
35/// can avoid redoing name resolution.
36#[derive(Debug, Default, PartialEq, Eq)]
37pub struct LoweredModule {
38 pub(crate) declarations: FxHashMap<Name, PerNs<ModuleDef>>,
39 pub(super) imports: Arena<ImportId, ImportData>,
40}
41
42#[derive(Debug, Default, PartialEq, Eq)]
43pub struct ImportSourceMap {
44 map: ArenaMap<ImportId, AstPtr<ast::PathSegment>>,
45}
46
47impl ImportSourceMap {
48 fn insert(&mut self, import: ImportId, segment: &ast::PathSegment) {
49 self.map.insert(import, AstPtr::new(segment))
50 }
51
52 pub fn get(&self, source: &ModuleSource, import: ImportId) -> TreeArc<ast::PathSegment> {
53 let file = match source {
54 ModuleSource::SourceFile(file) => &*file,
55 ModuleSource::Module(m) => m.syntax().ancestors().find_map(SourceFile::cast).unwrap(),
56 };
57
58 self.map[import].to_node(file).to_owned()
59 }
60}
61
62impl LoweredModule {
63 pub(crate) fn lower_module_query(
64 db: &impl PersistentHirDatabase,
65 module: Module,
66 ) -> Arc<LoweredModule> {
67 db.lower_module_with_source_map(module).0
68 }
69
70 pub(crate) fn lower_module_with_source_map_query(
71 db: &impl PersistentHirDatabase,
72 module: Module,
73 ) -> (Arc<LoweredModule>, Arc<ImportSourceMap>) {
74 let (file_id, source) = module.definition_source(db);
75 let file_id: HirFileId = file_id.into();
76 let mut source_map = ImportSourceMap::default();
77 let mut res = LoweredModule::default();
78 match source {
79 ModuleSource::SourceFile(it) => {
80 res.fill(&mut source_map, db, module, file_id, &mut it.items_with_macros())
81 }
82 ModuleSource::Module(it) => {
83 if let Some(item_list) = it.item_list() {
84 res.fill(
85 &mut source_map,
86 db,
87 module,
88 file_id,
89 &mut item_list.items_with_macros(),
90 )
91 }
92 }
93 };
94 (Arc::new(res), Arc::new(source_map))
95 }
96
97 fn fill(
98 &mut self,
99 source_map: &mut ImportSourceMap,
100 db: &impl PersistentHirDatabase,
101 module: Module,
102 file_id: HirFileId,
103 items: &mut Iterator<Item = ast::ItemOrMacro>,
104 ) {
105 let file_items = db.file_items(file_id);
106
107 for item in items {
108 match item {
109 ast::ItemOrMacro::Item(it) => {
110 self.add_def_id(source_map, db, module, file_id, it);
111 }
112 ast::ItemOrMacro::Macro(macro_call) => {
113 let item_id = file_items.id_of_unchecked(macro_call.syntax());
114 let loc =
115 MacroCallLoc { module, source_item_id: SourceItemId { file_id, item_id } };
116 let id = loc.id(db);
117 let file_id = HirFileId::from(id);
118 //FIXME: expand recursively
119 for item in db.hir_parse(file_id).items() {
120 self.add_def_id(source_map, db, module, file_id, item);
121 }
122 }
123 }
124 }
125 }
126
127 fn add_def_id(
128 &mut self,
129 source_map: &mut ImportSourceMap,
130 db: &impl PersistentHirDatabase,
131 module: Module,
132 file_id: HirFileId,
133 item: &ast::ModuleItem,
134 ) {
135 let ctx = LocationCtx::new(db, module, file_id);
136 match item.kind() {
137 ast::ModuleItemKind::StructDef(it) => {
138 if let Some(name) = it.name() {
139 let s = Struct { id: ctx.to_def(it) };
140 let s: ModuleDef = s.into();
141 self.declarations.insert(name.as_name(), PerNs::both(s, s));
142 }
143 }
144 ast::ModuleItemKind::EnumDef(it) => {
145 if let Some(name) = it.name() {
146 let e = Enum { id: ctx.to_def(it) };
147 let e: ModuleDef = e.into();
148 self.declarations.insert(name.as_name(), PerNs::types(e));
149 }
150 }
151 ast::ModuleItemKind::FnDef(it) => {
152 if let Some(name) = it.name() {
153 let func = Function { id: ctx.to_def(it) };
154 self.declarations.insert(name.as_name(), PerNs::values(func.into()));
155 }
156 }
157 ast::ModuleItemKind::TraitDef(it) => {
158 if let Some(name) = it.name() {
159 let t = Trait { id: ctx.to_def(it) };
160 self.declarations.insert(name.as_name(), PerNs::types(t.into()));
161 }
162 }
163 ast::ModuleItemKind::TypeAliasDef(it) => {
164 if let Some(name) = it.name() {
165 let t = TypeAlias { id: ctx.to_def(it) };
166 self.declarations.insert(name.as_name(), PerNs::types(t.into()));
167 }
168 }
169 ast::ModuleItemKind::ImplBlock(_) => {
170 // impls don't define items
171 }
172 ast::ModuleItemKind::UseItem(it) => {
173 self.add_use_item(source_map, it);
174 }
175 ast::ModuleItemKind::ExternCrateItem(it) => {
176 if let Some(name_ref) = it.name_ref() {
177 let path = Path::from_name_ref(name_ref);
178 let alias = it.alias().and_then(|a| a.name()).map(AsName::as_name);
179 self.imports.alloc(ImportData {
180 path,
181 alias,
182 is_glob: false,
183 is_prelude: false,
184 is_extern_crate: true,
185 });
186 }
187 }
188 ast::ModuleItemKind::ConstDef(it) => {
189 if let Some(name) = it.name() {
190 let c = Const { id: ctx.to_def(it) };
191 self.declarations.insert(name.as_name(), PerNs::values(c.into()));
192 }
193 }
194 ast::ModuleItemKind::StaticDef(it) => {
195 if let Some(name) = it.name() {
196 let s = Static { id: ctx.to_def(it) };
197 self.declarations.insert(name.as_name(), PerNs::values(s.into()));
198 }
199 }
200 ast::ModuleItemKind::Module(_) => {
201 // modules are handled separately directly by name res
202 }
203 };
204 }
205
206 fn add_use_item(&mut self, source_map: &mut ImportSourceMap, item: &ast::UseItem) {
207 let is_prelude =
208 item.attrs().any(|attr| attr.as_atom().map(|s| s == "prelude_import").unwrap_or(false));
209 Path::expand_use_item(item, |path, segment, alias| {
210 let import = self.imports.alloc(ImportData {
211 path,
212 alias,
213 is_glob: segment.is_none(),
214 is_prelude,
215 is_extern_crate: false,
216 });
217 if let Some(segment) = segment {
218 source_map.insert(import, segment)
219 }
220 })
221 }
222}
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